The GM-10 has a RS-232 interface, which not only transmits the radiation reading (one byte per detected particle),
but also powers the detector, via the handshake lines. A USB/serial adapter was used to connect the GM-10 to one
of the USB ports on the Raspberry Pi.

The following Python code reads the number of received bytes every second, and updates a graph once a minute with
the Counts Per Minute (CPM), which is the number of radiation detection events per minute. Some statistics are
also calculated: minimum, maximum, mean, and standard deviation. It also flashes an LED once per second, to show
that it is alive and running.